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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Annual to shrub; hairs simple, stellate, or glandular; plants in several genera scaly, mealy, or powdery from collapsed glands; monoecious, dioecious, with bisexual flowers, or with both bisexual and unisexual flowers. Stem: occasionally fleshy. Leaf: blade simple, generally alternate, occasionally fleshy or reduced to scales, veins pinnate; stipules 0. Inflorescence: raceme, spike, catkin-like, spheric head, axillary clusters of flowers, or flowers 1; bracts 0–5, herbaceous, generally persistent or strongly modified in fruit, wings, tubercles or spines present or 0. Flower: bisexual or unisexual, small, generally green; calyx parts (1)3–5, or 0 in pistillate flowers, free or fused basally (or ± throughout), leaf-like in texture, membranous, or fleshy, deciduous or not, often strongly modified in fruit; corolla 0; stamens 1–5, opposite sepals, filaments free, equal; anthers 4-chambered; ovary superior (1/2-inferior), chamber 1; ovule 1; styles, stigmas 1–4 (or stigmas sessile). Fruit: achene or utricle, generally falling with persistent calyx or bracts. Seed: 1, small, lenticular to spheric; seed coat smooth to finely dotted, warty, net-like, or prickly, margin occasionally winged.
100 genera, 1500 species: worldwide, especially deserts, saline or alkaline soils; some cultivated for food (Beta vulgaris subsp. vulgaris, beet, Swiss chard; Spinacia oleracea L., spinach; Chenopodium quinoa Willd., quinoa); and some worldwide, naturalized ruderal or noxious agricultural weeds. Nitrophila treated in Amaranthaceae, Sarcobatus treated in Sarcobataceae. Key to genera revised by Elizabeth H. Zacharias to incorporate Extriplex and Stutzia, 2 genera segregated from Atriplex. —Scientific Editors: Bruce G. Baldwin, David J. Keil, Thomas J. Rosatti.
Key to Chenopodiaceae
Subshrub, glabrous. Stem: generally many-branched, appearing jointed, green and fleshy when young, woody and not jointed in age. Leaf: opposite, sessile, base fused, decurrent, forming fleshy internode, tip obtuse to ± acute, soft. Inflorescence: spike, terminal, cylindric, dense; bracts leaf-like, fleshy; flowers 3(5) per axil, sessile, sunken in axis, free, not forming a 3-parted cavity at flower-fall. Flower: calyx fleshy, 3–4-lobed, deciduous in fruit; stamens 1–2; stigmas 2–3. Fruit: wall free from seed, membranous. Seed: vertical, seed coat hard, dark brown to black, tubercled; storage tissue (perisperm) abundant.
2 species: Mediterranean, California, northwestern Mexico. (Greek: jointed leg)
Plant 10–30 cm, clumps to 1 m diam. Stem: spreading to erect. Inflorescence: larger spikes 5–40 mm, 2–3 mm wide, fertile nodes < 20, non-flowering nodes distally generally < 14. Flower: anther 0.5–1 mm, dehiscing after exsertion. Seed: dark brown, 1–1.4 mm.
Salt marshes, alkaline flats; < 800 m. Great Central Valley, Central Coast, San Francisco Bay Area, South Coast, Channel Islands, w Mojave Desert, Sonoran Desert; northern Mexico. [Salicornia subterminalis Parish] Apr–Sep [Online Interchange]
Previous taxon: Arthrocnemum
Next taxon: Atriplex
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 19 2014
Citation for this treatment: [Author of taxon treatment] 2012. Arthrocnemum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=14292, accessed on Apr 19 2014
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